參數(shù)資料
型號(hào)： LX1671
廠商： Microsemi Corporation
英文描述： Multiple Output LoadSHARE? PWM
中文描述： 多輸出LoadSHARE？脈寬調(diào)制
文件頁(yè)數(shù)： 1/21頁(yè)
文件大?。?/td> 447K
代理商： LX1671
Microsemi
Integrated Products, Power Management
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright
2000
Rev. 1.0a, 2004-06-14
W
M
.
C
LX1671
Multiple Output LoadSHARE PWM
P
RODUCTION
D
ATA
S
HEET
I N T E G R A T E D P R O D U C T S
D E S C R I P T I O N
The LX1671 is a highly integrated
power supply controller IC featuring
three PWM switching regulator stages
with an additional onboard linear
regulator driver.
Two of the constant frequency
voltage-mode PWM phases can be
easily configured for a single Bi-Phase
high current output or two in-
dependently regulated outputs. Each
phase
incorporates
grammable soft-start sequence. This
versatility yields either three or four
independently regulated outputs with
full power sequencing capability giving
system
designers
flexibility in power supply design.
In Bi-Phase operation, the high
current (>30A) output can utilize
different supply rails allowing Forced
Current
Sharing
sources. Power loss and noise, due to
the ESR of the input capacitors, are
minimized by operating each PWM
output 180
°
out of phase. This
architecture also minimizes capacitor
requirements while maximizing re-
gulator response.
a
fully
pro-
the
ultimate
from
different
The additional outputs are capable of
supplying up to 5A (Linear Regulator
Driver) and 15A (Switching Regulator)
for I/O, memory, termination, and other
supplies surrounding today’s micro-
processor designs.
Each PWM regulator output is
programmed via a simple voltage-divider
network.
The
MOSFET R
DS(ON)
impedance, monitors
current limit conditions, in each PWM
phase, without the use of expensive
current sense resistors.
The LX1671 was designed to give
design engineers maximum flexibility
with respect to the MOSFET supply.
Each phase can utilize different supply
voltages for efficient use of available
supply rails. Additionally, when two
phases are configured in Bi-Phase output,
the LoadSHARE
TM
topology can be
programmed via inductor ESR selection.
There are three other methods that can
also be used with LoadSHARE
TM
. These
other methods are presented in the theory
of operation section of this data sheet.
LX1671,
utilizing
IMPORTANT:
For the most current data, consult
MICROSEMI
’s website:
http://www.microsemi.com
LoadSHARE is a Trademark of Microsemi Corporation
K E Y F E A T U R E S
Up to Four Independently
Regulated Outputs
Outputs As Low As 0.8V
Generated From An Internal 1%
Reference
Multiphase High Current Output
Reduces Required Capacitance
Integrated High Current MOSFET
Drivers
300kHz High Frequency Operation
Minimizes External Component
Requirements
Independent Phase Programmable
Soft-Start and Power Sequencing
Adjustable Linear Regulator Driver
Output
No current-sense resistors
DDR Termination Compliant
APPLICAT IONS /BENEFIT S
Multi-Output Power Supplies
Video Card Power Supplies
PC Peripherals
Portable PC Processor and I/O
Supply
P R O D U C T H I G H L I G H T
Memory Bus
....
DDR Termination
Memory Core
12V
3.3V
I/O
Graphics
Controller
DDR Memory
LX1671
Refer to Typical
Application for
complete circuit.
5V
Core
PACK AGE ORDER INFO
PW
38-Pin
LX1671-CPW
T
A
(
°
C)
Plastic TSSOP
LQ
Plastic MLPQ
38-Pin
LX1671-CLQ
0 to 70
Note: Available in Tape & Reel. Append the letters “TR” to the part number (i.e. LX1671CPWTR)
L
X
1
6
7
1
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LX1671 EVA KIT 功能描述:KIT EVAL FOR SWITCHING REGULATOR RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS 系列:LoadSHARE™ 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969
LX1671 EVAL KIT 制造商:Microsemi Corporation 功能描述:SWITCHING REGULATOR - Bulk
LX1671BCLQ 制造商:Microsemi Corporation 功能描述:SWITCHING REGULATOR - Bulk
LX1671CLQ 功能描述:IC REG CTRLR BUCK PWM VM 38MLPQ RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:LoadSHARE™ 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標(biāo)準(zhǔn)包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產(chǎn)品目錄頁(yè)面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR
LX1671CLQ-TR 制造商:Microsemi Corporation 功能描述:SWITCHING RGLTR. - Tape and Reel
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